{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular}{l*{7}{c}}
\toprule
            &\multicolumn{1}{c}{Cork \& wood (24)}&\multicolumn{1}{c}{Dyes (53)}&\multicolumn{1}{c}{Fish (3)}&\multicolumn{1}{c}{Coal (32)}&\multicolumn{1}{c}{Crude minerals (27)}&\multicolumn{1}{c}{Petroleum prod (33)}&\multicolumn{1}{c}{Iron (67)}\\\cmidrule(lr){2-2}\cmidrule(lr){3-3}\cmidrule(lr){4-4}\cmidrule(lr){5-5}\cmidrule(lr){6-6}\cmidrule(lr){7-7}\cmidrule(lr){8-8}
            &\multicolumn{1}{c}{(1)}   &\multicolumn{1}{c}{(2)}   &\multicolumn{1}{c}{(3)}   &\multicolumn{1}{c}{(4)}   &\multicolumn{1}{c}{(5)}   &\multicolumn{1}{c}{(6)}   &\multicolumn{1}{c}{(7)}   \\
\midrule
{}          &    -0.00683   &    0.000190   &     -0.0257   &      0.0366   &     -0.0544** &     -0.0418   &      0.0444   \\
            &    [0.0304]   &    [0.0297]   &    [0.0299]   &    [0.0348]   &    [0.0250]   &    [0.0319]   &    [0.0294]   \\
\midrule
N           &         122   &         122   &         122   &         122   &         122   &         122   &         122   \\
\bottomrule
\end{tabular}
}
